High-pressure effects on superconducting properties and crystal structure of Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6. (7th May 2021)

• Record Type: Journal Article
• Authors: Liu, Supeng; Matsumoto, Ryo; Jha, Rajveer; Yamashita, Aichi; Kawaguchi, Saori I; Goto, Yosuke; Takano, Yoshihiko; Mizuguchi, Yoshikazu
• Is Part Of: Journal of physics. Volume 33:Number 22(2021)
• Publication Date: 2021-05-07
• Subjects: pressure effect -- structural phase transition -- Bi-based superconductor -- layered superconductor -- diamond anvil cell -- synchrotron XRD; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/abe81b
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The effects of pressure on the superconducting properties of a Bi-based layered superconductor La2 O2 Bi3 Ag0.6 Sn0.4 S6, which possesses a four-layer-type conducting layer, have been studied through the electrical resistance and magnetic susceptibility measurements. The crystal structure under pressure was examined using synchrotron x-ray diffraction at SPring-8. In the low-pressure regime, bulk superconductivity with a transition temperature T c of ∼4.5 K was induced by pressure, which was achieved by in-plane chemical pressure effect owing to the compression of the tetragonal structure. In the high-pressure regime above 6.4 GPa, a structural symmetry lowering was observed, and superconducting transitions with a T c ∼ 8 K were observed. Our results suggest the possible commonality on the factor essential for T c in Bi-based superconductors with two-layer-type and four-layer-type conducting layers.